Improvement in combination-locks



G. F. KNIGHT. COMBINATION-LOCK,

Patentea Jam-4, 1876.

ATTORNEYS.

N. PETERS. PHOTO LTHOGRAFHER. WASHINGTON D C UNITED STATES PAT T GEORGE F. KNIGHT, or CARROLL, OHIO, ASSIGNOR TO HIMSELF, .Ln NAN, AND NATHANIEL HAvENs, or sAME P AcE.

' LIMPROVEMENTINCQMBINAT IQN LOCKS.

Specif cationforming part of Letters Patent No.

$71,820, dated January 4, 1876; application filed November 29, 1675.

' description of the same, reference being had to the accompanying drawing, forming a part of this specification, in-which Figure l is a view of the lock, with the faceplates removed and thehinged leaf and jour- .nal-framebroken away; Fig. 2, a side-view of the bolt-keeper; Fig.v 3, a detail of the latchbolt; Fig.v 4,- a detail of the key, with, pivoted index-hand;r Fig. 5, a d and key-shaft.

This invention relates to certain improvements in combination-locks, applicable to storehouses,dwellings,jsafes, vaults, &c., and de-': signed to increase the security of the same@ against the efforts of burglars-and thieves. It 3 consists, principally, in anumber or series of 5 bolts, so arranged with small gear-wheels and connecting-rods, or their equivalents, that the withdrawal of one bolt shoots into place and locks another, until a certain number of turns are made, which constitutes the combination at which all of the bolts are withdrawn and the door unlocked. It also consists in the particular construction of a bell-ringing device, which, operating in connection with the bolts, keeps up an incessant ringing during any attempt to unlock the same. The invention also consists in other details of construction, hereinafter described, and pointed outin the claims.

In the drawing, A represents the frame or case of my improved combination-lock. B B B are three bolts, which are located in guideways, and connected by pivoted connectingrods 0 G C with the double cranks D D D of the three different-sized gear-wheels E E E, which said bolts, connecting-rods, and wheels constitute the combination part of the lock. F is a detachable frame-piece, fastened inside the look by means of keys, in which frame are journaled the ends of the crankshafts of the gear-wheels. G is the main shaft of the gear-wheel E, which is made to project on each side of the lock far enough to receive the key H. The end of said shaft, in-' etail of the dial-plate I hea'd,.which -is operated upon by the studs d stead of being of the ordinary shape, is made with one side round and the other angular, and the hole in the, key is made to correspond, the object of which construction. will be hereinafterexplained- 1 v Q ,I is pivoted hook, attached to the connecting-rod of the larger. wheel, which-forms with the hooked. end of the said connectingrod a fastening for the crank-shaft, which may be readily detached when desirable, for changing, the combination or for other purposes. J is a bell placed inside the, lock, and a is a hammer, attached through a spring, I), to a pivoted lever, K. Said lever isheldbetween two springs, c c, and has a double-inclined d of the gear-wheel E to ring the belL- L is a supplemental bolt or dead-latch, which is operatedthrough a thumb-piece, e, by hand, which bolt does not formv a part of the combigency to give greater security. jL-s'fiif knob latch or bolt, which is to he used inthe day-time. Said" bolt is recessed in its rear portion, slotted at f,v and provided with an abutment, g. N is the knob shaft, which passes through slot f, and is provided with an armed hub, h, which, when the shaft is turned, bears against the abutment g to withdraw the bolt, the said bolt being forced out again by a spiral spring, 2', which is contained in the recess of the bolt, and bears against a piece, j, attached to the lock-frame. O is a graduated dial-plate, placed upon one side ot' the lock and around the end of the shaft G, by means of which the number of turns which unlocks the com bination may be accurately determined. The angular or pointed side of the shaft operates as an index-hand for this purpose, so

that it will be seen that the peculiar shape of the said shaft serves a twofold purpose, one

of which is to prevent keys ot' the ordinary construction from being used upon the lock, and the other is to ascertain accurately the position of the key-shaft with respect to the dial-plate, so as to find the unlocking position. To determine the number of turns for opening the combination an index-hand, k, is used. Said hand is pivoted at one end in the shank of the key, and is arranged to turn lonnation, but is intended tobe used in an emerjected at right angles \vhen imuse. Pisa and is provided with a hinged front portion,

7 securely holds 1 the bolt.

gitudinally in a slot in the shank or be. pro

hinged leaf, which tbrms a part ot" the outer casing of the lock, and is designed to admit of ready access to the working parts of the same. Said leaf isprovided with a th11mb nut,l, which is-permaneutly swii 'eled in the' same," and is intended to engage with a screw-bolt; 1, s05 as to form a seeurefastening for said leaf, and yet admit of the easy opening of the leaf with out the use of a screw-driverorrwrench, and without rumiin g the risk of dropping or losing the nut. Q is a specially-constructed keeper, which receives the protruding bolts andholds the door closed. Said keeper is intended to beplaced upon the inside of the door-jarnb,

R, with upperand lower flanges n n, perforated to receivea belt or rod, S, so that when the rod isin,the portion R is 'fastened to Q, and

The object of this construction is=to. enable anyone toescape from theinsideof the building, in case of fire 'or otheremer'gency, bysim plyremo'ving the rod, without stoppingl'tounlock the bolts -by thecombination;

. i The operation ofm'y improved combination lockwisas follows: 'The lock being provided witha given number-of bolts and gea-r wheels, and arranged to open by a given 'nu mber ot" revolutions of the main shaft, (which in the'de= viceillustrated in the drawing is three1in number,)it will be seen thatanygreateror lessi number ot' revolutions, or partial revolutions, will onlyfhavethe efl'ectto withdraw' 'one'bolt and introduce another, andas'the rotation of thewheehcarrying the studs causes-an alarm t'owbe rung upon the belhanytalnpering with the iocld will arouse the inmates of the building.

1 do notconjfine myself to any numberof' ldoor bell. y Having thus des'cribedt my bolts or gear-wheels, as different numbers" of devices may be readily; transformed into a inyention, what I claim as new isl. The series of bolts B B B, combined and operated together siinultaneously through different-sized gear-wheel, E EFF}, but in difl'erent positions, until'a giverifcombination is y F reached, substantially as an d for the purpose described.

2. The combination, with the bolt B, connecting-rod O, crank D, and) gear-wheel E,

carrying studs d, of the-pivoted leverK- and bell J assandwtbr the;purposegdescribedi r 3f. The-:icombination', withthehvemnli shafts of the gear-wheels; thewbolts} aindtheirwon; 'necting-rods,-- of r a pivoted hookgwI; substan tially as and: for thelpurposeidescribed 4t The key-shaft;-having'j'onesideiround and theother angular, in combinationiwith at grad:

natedh dial-platep substantially as and for tlie purpose described' t Y 5. The combine lilon' wl'tllfl', the graduated di ahplateyot'the key, having: a -pivotedi indem hand, as and for the purpose djescribedu 1 6; Thecolnbination, lwiththelock;thaving 'a screw-boltpot' the ihinged-leafqP, havingmwpefl mauently-swiveled thumb-nut, tbr theplrrpose described; I

7. The" combination, with' the stationary portion R, havi ng perforated flan "ges n 10; 1 for the:purpose describedi GEORGEwF. i [Gr-HT, Witnesses: f

J. H. NAN, NATHANIEL Hymns:

from tli'e gear wheels and placing-1a knob" upon the main shaft, it willhe seen thatthe balance of the 

